Bump django-stubs from 1.7.0 to 1.8.0
Bump django-stubs from 1.7.0 to 1.8.0

Bumps [django-stubs](https://github.com/typeddjango/django-stubs) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/typeddjango/django-stubs/releases)
- [Commits](https://github.com/typeddjango/django-stubs/compare/1.7.0...1.8.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
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